1274934 九、發明說明： 【發明所屬之技術領域】 本毛明提供-種平面顯示模組，尤指—種不需外框固定 之平面顯示模組。 【先前技術】 隨著科技的日新月異，輕薄、省電、可攜帶式的智慧型 資訊產品已經充斥了我們的生活空間，而平面顯示模組則 在其間扮演了相當重要的角色。其中，由於液晶顯示模組 具有外型輕薄、耗電量少以及無輻射污染等特性，因此已 被廣泛地應用在筆記型電腦(noteb〇〇k)、個人數位助理 (PDA)及手機等攜帶式資訊產品上，而在消費性資訊產品中 有極大的市場佔有率，甚至已有逐漸取代桌上型電腦之 CRT監視器及傳統電視的趨勢。 一般而言，液晶顯示模組包含有液晶顯示面板、光源、 導光板以及數種光學膜片。請參考第1圖，第1圖為習知 一液晶顯示模組1 〇的剖面示意圖。如第1圖所示，液晶顯 1274934 示模組ίο包含有一液晶顯示面板12、一設於液晶顯承 板12下方之導光板Μ、設於導光板14以及液晶顯 12之間的擴散片18及稜鏡片16、一設於導光板14下 反射片（reflecting sheet) 20以及—外框22。此外，液晶 不模組10另包含有一光源（圖未示），設於導光板 ' 〈侧 邊，用來提供液晶顯示面板12顯示晝面時所需要的光源 導光板14係用來將光源14產生之光線均句傳導至擴散片° 18’擴散片18再將通過的光線進一步散射，以提供顯^面 板！2較均勻分散之光線。稜鏡片16的主要作用在增加液 晶顯示模組U)的亮度’其原理與導光板14的聚光效果相 似’且稜鏡片16可進-步修正照光強度的差異，使顯示面 板12接收到的光線能有—較均勻的照光強度分布。反射片 之功闕储導光板Μ底部射k光狀射回導光板 14中，以提高光利用率。此外，外框22係用來固定液晶 顯示面板12、稜鏡片16、擴散片18、導歧14以及反射 片20 〇 、傳統上’液晶顯示模、组10的外框μ係由金屬材料所製 成，目前業界亦有使肖轉材料代替傳統的金屬材料來製 作外框22。然❿，不論是金屬或塑膠材料之外框22，皆會 具有一㈣厚度以及重量’造«界在針對整個液晶_ 1274934 模組10進行小型化之研發時，會受限於外框22尺寸及厚 度的影響，並進一步影響到手機、PDA等終端產品的尺寸 設計。 由上可知，如何改善習知平面顯示模組之設計，以滿足 市場對於消費性應用產品輕薄化的要求，仍為業界亟待研 究的方向。 【發明内容】 因此本發明之主要目的在於提供一種具有特殊設計導 光板的平面顯示模組，以取代習知平面顯示模組之外框的 固定功能，達到使平面顯示模組小型化之目的。 根據本發明之申請專利範圍，係揭露一種平面顯示模 組，其包含有一導光板、至少一光學膜片以及一平面顯示 面板。其中，該導光板包含有一透光板體以及至少一突出 於透光板體表面之定位柱（fastener)，而該光學膜片係設於 導光板之頂面，且具有至少一相對應於該定位柱的缺口。 此外，平面顯示面板係設於光學膜片以及導光板之上。 1274934 由於本發明平面顯示模組係利用導光板表面之定位柱 以及設於導光板上方之光學膜片的缺口，以將光學膜片固 定於導光板上方，另可配合固定膠將平面顯示面板固定於 光學膜片或定位柱上方，因此本發明平面顯示模組不需要 習知平面顯示模組中之外框來固定各元件，不但能大幅節 省生產成本，更可以進一步改善平面顯示模組的尺寸設計 及重量，達到使平面顯示模組小型化的目的。 【實施方式】 請參考第2圖與第3圖，第2圖為本發明第一實施例之 平面顯示模組30的剖面示意圖，第3圖為第2圖所示導光 板32以及擴散片40之外觀示意圖。平面顯示模組30包含 有一導光板32、一平面顯示面板38、一設於導光板32底 面之反射片52以及複數個光學膜片，如圖中所示之擴散片 40以及稜鏡片42。在本實施例中，平面顯示模組30為一 液晶顯示模組，因此平面顯示面板38係為一液晶顯示面 板。本發明平面顯示模組30另包含有一光源（圖未示），設 於導光板32的侧邊，以使光線從導光板32的入光面50進 入導光板32中。導光板32包含有一透光板體34以及複數 個突出於透光板體34出光面表面之定位柱36，在本實施 1274934 J中 戈位柱36為圓枝狀，且分別設於矩形導光板32 之四角附近。擴散片40以及稜鏡片42係依序設於導光板 2之頂面，且各具有複數個相對應於定位柱36的缺口， 中擴畋片40以及稜鏡片42所設置的數量及順序可視 產°口 "又^需求加以變化，在第2圖中僅顯示一層稜鏡片 42以第3圖所示之擴散片4〇為例，其具有呈孔洞圖案之 四缺口 48，分別設於矩形擴散片34的四角附近，因此當 擴散片40放置於導光板32上方時，定位柱％可剛好貫穿 於缺口 48之中，使擴散片40得以被固定於導光板32上方 而不致左右晃動；亦可使用熱熔接之方式將定位柱36和擴 散片40與稜鏡片42接合在一起。 此外，在導光板32之定位柱36外側另可選擇性設置一 層定位膠44，以辅助固定擴散片40於導光板32頂面上， 如第3圖所示，定位膠44係沿著定位柱乂外侧設置，以 加強導光板32上方光學膜片的固定。定位膠料可為雙面 膠、务、外光(UV)膠或熱熔膠。同時，在光學膜片之間，例 如擴散片40以及棱鏡片42之間亦可再增設置定位膠（圖未 示），以加強光學膜片之固定。 另一方面，為了將平面顯示面板38固定於光學膜片以 1274934 及導光板32之上，在最上層光學膜片或定位柱36上亦可 設置一層固定膠46，在本實施例中，固定膠46係設於稜 鏡片42表面，且固定膠4β可為口乂膠、熱熔膠或雙面膠。 由於本發明平面顯示模組3〇的導光板32具有特殊設計 的定位柱36，可以貫穿於擴散片40及稜鏡片42等光學膜 片的相對應缺π 48中，因此可以直將將複數個光學膜片固 定於導光板32表面，而不需要習知平面顯示模組中的外框 來加以固定光學膜片，故能有效節省平面顯示模組30的成 本並縮減外圍尺寸。此外，值得注意的是，導光板32的長 寬尺寸必須略大於平面顯示面板38，以防止平面顯示模組 30裝置於終端產品時，終端產品的元件會撞到或刮傷設於 最表層的平面顯不面板38。再者，定位柱36的數量及設 置位置並不限於第3圖所示之情形，而可依實際需求而加 以變化設計。 明參考第4圖’第4圖為本發明第二實施例之平面顯示 模組30的剖面示意圖，為便於說明，第4圖之標號係沿用 第2圖之標號。在第4 _+，定位柱36之頂端係直接與導 光板32 —體成型或再利用後續加工等方式而製作成—大 頭釘(tack)形狀，即定位柱36之頂端略大於擴散片4〇以及 1274934 稜鏡片42之缺口 48,以使組裝後之擴散片40和稜鏡片42 不會朝平面顯示面板38的方向滑動。 請參考第5圖與第6圖，第5圖為本發明第三實施例之 平面顯示模組60的侧面示意圖，第6圖為第5圖所示導光 板62以及擴散片70的外觀示意圖。第5圖所示平面顯示 模組60包含有一導光板62、一擴散片70、一稜鏡片72、 一反射片74以及一平面顯示面板68。其中，導光板62包 含有一透光板體64以及複數個突出於透光板體64表面的 定位柱66。值得注意的是，每一定位柱66為一三角柱， 且包含有至少二侧面66a、66b，分別與透光板體64的兩 侧面64a、64b共平面，亦即每一三角形定位柱66之一頂 角係延伸於矩形透光板體64之一頂角上，且每一定位柱 66之截面形狀為直角三角形。 導光板62上方設置有複數個光學膜片，包含有擴散片 70以及稜鏡片72。以擴散片70為例，其包含有四缺口76, 分別對應於導光板62之定位柱66,因此當擴散片70置於 導光板62頂面上時，定位柱66會剛好位於缺口 76中，以 使擴散片70卡固於透光板體64上方而不會左右移動。同 樣地，稜鏡片72亦具有相對應於定位柱66的四缺口，因 11 1274934 此當稜鏡片72置於擴散片70上方時，定位柱66亦會位於 稜鏡片72的缺口中而使稜鏡片72固定於擴散片70之上。 在本實施例中，各定位柱66的上表面另塗佈有一層固 定膠78，以將平面顯示面板68固定於導光板62以及稜鏡 片72之上。此外，各光學膜片以及平面顯示面板68之間 亦可於邊緣處分別設置一層固定膠（圖未示），如UV膠、熱 熔膠或雙面膠等，以加強固定效果。 請參考第7圖與第8圖，第7圖為本發明第四實施例之 平面顯示模組60的側面示意圖，第8圖則是第7圖所示平 面顯示模組60的俯視圖。在第7圖與第8圖中，各元件係 沿用第5圖與第6圖之標號，以供對照。第7圖所示之導 光板62包含有四定位柱66，且各定位柱66係呈三角柱形 狀，位於矩形透光板體64之四角，而每一定位柱66之二 侧面係與透光板體64之二侧面共平面。此外，平面顯示面 板68亦具有四缺口 68a，因此，當平面顯示面板68放置 於稜鏡片72上方時，定位柱66亦會位於平面顯示面板68 之四缺口 68a中，以使平面顯示面板68固定於四定位柱 66之間而不會左右移動。另一方面，在定位柱66之一側 面66c表面上，或各光學膜片以及平面顯示面板68之間亦 12 1274934 可選擇性設置定位膠及固定膠（圖未示），以輔助固定各光 學膜片以及平面顯示面板68。此外，如第8圖所示，平面 顯示模組60包含有至少一光源產生器80，設於導光板62 之侧面，且光源產生器80可選擇性使用發光二極體(light emitting diode，LED)或其他習知光源。 請參考第9圖與第10圖，第9圖為本發明第五實施例 之平面顯示模組60的剖面示意圖，第10圖則為第9圖所 示導光板62以及擴散片70的外觀示意圖。為便於說明， 第9圖與第10圖之標號仍然沿用第5圖與第6圖之標號。 如第9圖與第10圖所示，導光板62表面僅設有一定位柱 66，且定位柱66之形狀為一三角柱，而擴散片70則包含 有一相對應於定位柱66之缺口 76，即三角形孔洞。因此， 當擴散片76置於導光板62上方時，三角形定位柱66會貫 穿於擴散片76的缺口 76之中，並將擴散片76固定於導光 板62表面而不會左右移動。同樣地，稜鏡片72亦包含有 相對應於定位柱66的三角形缺口，以供定位柱66貫穿而 將其固定。另一方面，在導光板62之透光板體64表面、 各光學膜片以及平面顯示面板68之間亦可選擇性設置有 定位膠82,以輔助固定設於透光板體64表面之光學薄膜。 13 1274934 此外，在本實施例中，定位柱66之截面形狀並不限於 三角形，任何圓形以外之多角形狀，例如四角形、五角形 專能限制水平方向移動及旋轉的設計皆 < 為定位柱66之 截面形狀，而光學膜片之缺口亦需設計為相對應的形狀缺 口’便可僅藉由一定位柱66而將光學膜片固定於導光板 62表面。 在本發明第六實施例中，導光板表面之定位柱設計係結 合本發明第一實施例以及第三實施例，因此，各定位柱可 分別為設於矩形透光板體頂角並與透光板體侧邊共平面之 二角柱，或是貫穿光學膜片的圓形柱，以最佳化光學膜片 的固定效果。 ;由於本發明平面顯示模組之導光板具有特殊定位柱之 設計’再配合具有相對應缺σ之光學膜片，便可將光學膜 片固定於導光板表面’可省去習知平面顯示模組中的外 框’而節省製作成本，更可縮小本發明平面顯示模組之尺 t，使整個平面顯稍_錢縮小—料框的厚度。同 I山2於t有外框，當將本發明平面顯示模組裂置於 :端產品時，可湘終端產㈣外殼取財發料面顯示 板組的外框’例如財機外殼固定本發明平面顯示模組於 1274934 手機中，便可有效節省或改善液晶顯示模組以及手機等終 端產品的尺寸。綜上所述，本發明平面顯示模組可有效改 善習知技術中因為外框而對平面顯示模組造成的尺寸限 制，而進一步滿足市場對於平面顯示模組小型化的需求。 以上所述僅為本發明之較佳實施例，凡依本發明申請專 利範圍所做之均等變化與修飾，皆應屬本發明專利之涵蓋 範圍。 【圖式簡單說明】 第1圖為習知一液晶顯示模組的剖面示意圖。 第2圖為本發明第一實施例之平面顯示模組的剖面示意 圖。 第3圖為第2圖所示導光板以及擴散片的外觀示意圖。 第4圖為本發明第二實施例之平面顯示模組的剖面示意 圖。 第5圖為本發明第三實施例之平面顯示模組的側面示意 圖。 第6圖為第5圖所示導光板以及擴散片的外觀示意圖。 第7圖為本發明第四實施例之平面顯示模組的侧面示意 15 1274934 圖。 第8圖為第7圖所示平面顯示模組的俯視圖。 第9圖為本發明第五實施例之平面顯示模組的剖面示意 圖。， 第10圖為第9圖所示導光板以及擴散片的外觀示意圖。 【主要元件符號說明】1274934 IX. Description of the invention: [Technical field to which the invention pertains] The present invention provides a flat display module, in particular, a flat display module that does not require an outer frame to be fixed. [Prior Art] With the rapid development of technology, smart, energy-saving and portable smart information products have flooded our living space, and flat display modules have played a very important role. Among them, the liquid crystal display module has been widely used in notebook computers (noteb〇〇k), personal digital assistants (PDAs), and mobile phones because of its slimness, low power consumption, and no radiation pollution. In the case of information products, there is a huge market share in consumer information products, and there is even a tendency to gradually replace CRT monitors and traditional TVs for desktop computers. Generally, a liquid crystal display module includes a liquid crystal display panel, a light source, a light guide plate, and a plurality of optical films. Please refer to FIG. 1 , which is a cross-sectional view of a conventional liquid crystal display module 1 . As shown in FIG. 1 , the liquid crystal display 1274934 module includes a liquid crystal display panel 12 , a light guide plate disposed under the liquid crystal display panel 12 , and a diffusion sheet 18 disposed between the light guide plate 14 and the liquid crystal display 12 . The cymbal sheet 16 is disposed on the lower reflecting sheet 20 and the outer frame 22 of the light guide plate 14. In addition, the liquid crystal module 10 further includes a light source (not shown) disposed on the side of the light guide plate < </ RTI> for providing the light source light guide plate 14 required for the liquid crystal display panel 12 to display the fascia. The resulting light is transmitted to the diffuser. The 18' diffuser 18 further scatters the passing light to provide a panel! 2 more evenly dispersed light. The main function of the cymbal 16 is to increase the brightness of the liquid crystal display module U) 'the principle is similar to that of the light guide plate 14' and the cymbal 16 can further correct the difference in illumination intensity to be received by the display panel 12. Light can have a more uniform illumination intensity distribution. The light of the reflector is stored in the light guide plate at the bottom of the light guide plate, and is returned to the light guide plate 14 to improve the light utilization efficiency. In addition, the outer frame 22 is used to fix the liquid crystal display panel 12, the cymbal 16, the diffusion sheet 18, the guide 14 and the reflection sheet 20 〇. Traditionally, the liquid crystal display module and the outer frame μ of the group 10 are made of a metal material. Cheng, the industry has also made the Shaw material instead of the traditional metal material to make the frame 22. Then, regardless of the metal or plastic material, the frame 22 will have a thickness of one (four) and the weight of the manufacturing sector will be limited by the size of the outer frame 22 when the entire liquid crystal _ 1274934 module 10 is miniaturized. And the impact of thickness, and further affect the size design of mobile phones, PDAs and other end products. It can be seen from the above that how to improve the design of the conventional flat display module to meet the market demand for thin and light consumer products is still in the direction of the industry. SUMMARY OF THE INVENTION Therefore, the main object of the present invention is to provide a flat display module having a specially designed light guide plate, which can replace the fixed function of the outer frame of the conventional flat display module, thereby achieving the purpose of miniaturizing the flat display module. According to the scope of the invention, there is disclosed a flat display module comprising a light guide plate, at least one optical film, and a flat display panel. The light guide plate includes a light transmissive plate body and at least one positioning protrusion protruding from the surface of the light transmissive plate body, and the optical film is disposed on the top surface of the light guide plate, and has at least one corresponding to the Position the notch of the column. In addition, the flat display panel is disposed on the optical film and the light guide plate. 1274934 The flat display module of the present invention utilizes a positioning post on the surface of the light guide plate and a notch of the optical film disposed above the light guide plate to fix the optical film above the light guide plate, and can also fix the flat display panel with the fixing glue. The flat display module of the present invention does not require the outer frame of the flat display module to fix the components, which not only saves the production cost, but also further improves the size of the flat display module. Design and weight to achieve the purpose of miniaturizing the flat display module. [Embodiment] Please refer to FIG. 2 and FIG. 3, FIG. 2 is a schematic cross-sectional view of a flat display module 30 according to a first embodiment of the present invention, and FIG. 3 is a light guide plate 32 and a diffusion sheet 40 shown in FIG. Schematic diagram of the appearance. The flat display module 30 includes a light guide plate 32, a flat display panel 38, a reflective sheet 52 disposed on the bottom surface of the light guide plate 32, and a plurality of optical films, such as the diffusion sheet 40 and the cymbal sheet 42 shown in the drawing. In this embodiment, the flat display module 30 is a liquid crystal display module, and thus the flat display panel 38 is a liquid crystal display panel. The flat display module 30 of the present invention further includes a light source (not shown) disposed on the side of the light guide plate 32 to allow light to enter the light guide plate 32 from the light incident surface 50 of the light guide plate 32. The light guide plate 32 includes a light-transmissive plate body 34 and a plurality of positioning posts 36 protruding from the light-emitting surface of the light-transmitting plate body 34. In the present embodiment, 1274934 J, the gray-position posts 36 are round branches and are respectively disposed on the rectangular light guide plates. Near the corner of 32. The diffusion sheet 40 and the cymbal sheet 42 are sequentially disposed on the top surface of the light guide plate 2, and each has a plurality of notches corresponding to the positioning post 36. The number and sequence of the central expansion gusset 40 and the cymbal 42 are visible. In the second figure, only one layer of the cymbal sheet 42 is shown as an example of the diffusion sheet 4 第 shown in FIG. 3, which has four notches 48 in a hole pattern, which are respectively disposed on the rectangular diffusion. When the diffusion sheet 40 is placed above the light guide plate 32, the positioning column % can just pass through the notch 48, so that the diffusion sheet 40 can be fixed above the light guide plate 32 without shaking left and right; The positioning post 36 and the diffusion sheet 40 are joined to the crotch panel 42 by means of heat sealing. In addition, a layer of positioning adhesive 44 may be selectively disposed on the outer side of the positioning post 36 of the light guide plate 32 to assist in fixing the diffusion sheet 40 on the top surface of the light guide plate 32. As shown in FIG. 3, the positioning adhesive 44 is along the positioning post. The outer side of the light guide plate 32 is fixed to fix the optical film above the light guide plate 32. The positioning compound can be double-sided adhesive, special-purpose (UV) glue or hot melt adhesive. At the same time, a positioning glue (not shown) may be further disposed between the optical films, such as the diffusion sheet 40 and the prism sheet 42, to reinforce the fixation of the optical film. On the other hand, in order to fix the flat display panel 38 to the optical film 1274934 and the light guide plate 32, a layer of fixing glue 46 may be disposed on the uppermost optical film or the positioning post 36. In this embodiment, the fixing is fixed. The glue 46 is disposed on the surface of the bracts 42 and the fixing glue 4β can be a mouth glue, a hot melt adhesive or a double-sided tape. Since the light guide plate 32 of the flat display module 3 of the present invention has a specially designed positioning post 36, it can penetrate through the corresponding π 48 of the optical film such as the diffusion sheet 40 and the cymbal sheet 42, so that a plurality of The optical film is fixed on the surface of the light guide plate 32, and the outer frame of the flat display module is not required to fix the optical film, so that the cost of the flat display module 30 can be effectively saved and the peripheral size can be reduced. In addition, it should be noted that the length and width of the light guide plate 32 must be slightly larger than the flat display panel 38 to prevent the components of the terminal product from colliding or scratching the outermost layer when the flat display module 30 is mounted on the terminal product. The panel displays no panel 38. Further, the number and position of the positioning posts 36 are not limited to those shown in Fig. 3, but may be changed according to actual needs. 4 is a cross-sectional view of a flat display module 30 according to a second embodiment of the present invention. For convenience of explanation, the reference numerals of Fig. 4 follow the reference numerals of Fig. 2. In the fourth _+, the top end of the positioning post 36 is directly formed with the light guide plate 32 or reused in subsequent processing to form a tack shape, that is, the top end of the positioning post 36 is slightly larger than the diffusion sheet 4〇. And the notch 48 of the 1274934 cymbal 42 is such that the assembled diffuser 40 and the cymbal 42 do not slide in the direction of the flat display panel 38. Please refer to FIG. 5 and FIG. 6. FIG. 5 is a side view of the flat display module 60 according to the third embodiment of the present invention, and FIG. 6 is a schematic view showing the appearance of the light guide plate 62 and the diffusion sheet 70 shown in FIG. The flat display module 60 shown in FIG. 5 includes a light guide plate 62, a diffusion sheet 70, a cymbal sheet 72, a reflection sheet 74, and a flat display panel 68. The light guide plate 62 includes a light transmissive plate body 64 and a plurality of positioning posts 66 protruding from the surface of the light transmissive plate body 64. It should be noted that each positioning post 66 is a triangular column and includes at least two side faces 66a, 66b which are coplanar with the two side faces 64a, 64b of the light transmissive plate body 64, that is, one of each triangular positioning post 66. The apex angle extends over a top corner of the rectangular light transmissive plate body 64, and each of the positioning posts 66 has a cross-sectional shape of a right triangle. A plurality of optical films are disposed above the light guide plate 62, and include a diffusion sheet 70 and a cymbal sheet 72. For example, the diffusion sheet 70 includes four notches 76 corresponding to the positioning posts 66 of the light guide plate 62. Therefore, when the diffusion sheet 70 is placed on the top surface of the light guide plate 62, the positioning post 66 is located just in the notch 76. The diffusion sheet 70 is locked above the light-transmitting plate body 64 without moving left and right. Similarly, the cymbal 72 also has four notches corresponding to the positioning post 66. Since the cymbal 72 is placed over the diffuser 70, the locating post 66 will also lie in the notch of the cymbal 72 to cause the cymbal. 72 is fixed to the diffusion sheet 70. In this embodiment, the upper surface of each positioning post 66 is further coated with a layer of fixing glue 78 to fix the flat display panel 68 to the light guide plate 62 and the cymbal 72. In addition, a layer of fixing glue (not shown), such as UV glue, hot melt adhesive or double-sided tape, may be disposed between the optical film and the flat display panel 68 to enhance the fixing effect. Please refer to FIG. 7 and FIG. 8. FIG. 7 is a side view of the flat display module 60 according to the fourth embodiment of the present invention, and FIG. 8 is a plan view of the flat display module 60 shown in FIG. In Figures 7 and 8, the elements of Figures 5 and 6 are used for comparison. The light guide plate 62 shown in FIG. 7 includes four positioning posts 66, and each positioning post 66 is in the shape of a triangular prism, which is located at the four corners of the rectangular transparent plate body 64, and the two side faces of each positioning post 66 are combined with the light transmissive plate. The two sides of the body 64 are coplanar. In addition, the flat display panel 68 also has four notches 68a. Therefore, when the flat display panel 68 is placed over the cymbal 72, the positioning post 66 is also located in the four notches 68a of the flat display panel 68 to fix the flat display panel 68. It is between the four positioning posts 66 and does not move left and right. On the other hand, on the surface of one side 66c of the positioning post 66, or between the optical film and the flat display panel 68, 12 1274934 can be selectively provided with a positioning glue and a fixing glue (not shown) to assist in fixing the respective optics. The diaphragm and the flat display panel 68. In addition, as shown in FIG. 8, the flat display module 60 includes at least one light source generator 80 disposed on the side of the light guide plate 62, and the light source generator 80 can selectively use a light emitting diode (LED). ) or other conventional light sources. Please refer to FIG. 9 and FIG. 10 , FIG. 9 is a cross-sectional view of a flat display module 60 according to a fifth embodiment of the present invention, and FIG. 10 is a schematic diagram of the appearance of the light guide plate 62 and the diffusion sheet 70 shown in FIG. 9 . . For convenience of explanation, the numerals of Figs. 9 and 10 still follow the numerals of Figs. 5 and 6. As shown in FIG. 9 and FIG. 10, the surface of the light guide plate 62 is only provided with a positioning post 66, and the positioning post 66 is shaped like a triangular post, and the diffuser 70 includes a notch 76 corresponding to the positioning post 66, that is, Triangle holes. Therefore, when the diffusion sheet 76 is placed above the light guide plate 62, the triangular positioning post 66 penetrates through the notch 76 of the diffusion sheet 76, and the diffusion sheet 76 is fixed to the surface of the light guide plate 62 without moving left and right. Similarly, the cymbal 72 also includes a triangular notch corresponding to the locating post 66 for the locating post 66 to be secured therethrough. On the other hand, a positioning adhesive 82 may be selectively disposed on the surface of the light-transmitting plate body 64 of the light guide plate 62, the optical film, and the flat display panel 68 to assist in fixing the optical surface disposed on the surface of the light-transmitting plate body 64. film. 13 1274934 In addition, in the present embodiment, the sectional shape of the positioning post 66 is not limited to a triangle, and any polygonal shape other than a circular shape, such as a quadrangular shape, a pentagon shape, and a design for restricting horizontal movement and rotation are all "positioning pillars 66". The shape of the cross section, and the notch of the optical film also needs to be designed as a corresponding shape notch, so that the optical film can be fixed to the surface of the light guide plate 62 only by a positioning post 66. In the sixth embodiment of the present invention, the positioning column design of the surface of the light guide plate is combined with the first embodiment and the third embodiment of the present invention. Therefore, each positioning post can be respectively disposed at the top corner of the rectangular transparent plate body and transparently A prismatic prism on the side of the light plate body or a circular column penetrating the optical film to optimize the fixing effect of the optical film. Because the light guide plate of the flat display module of the present invention has the design of a special positioning column, and the optical film having the corresponding σ is matched, the optical film can be fixed on the surface of the light guide plate, and the conventional flat display mode can be omitted. The outer frame of the group can save the manufacturing cost, and can further reduce the size t of the flat display module of the present invention, so that the entire plane is slightly reduced and the thickness of the frame is reduced. When there is a frame with the I mountain 2 at t, when the flat display module of the present invention is split at the end product, the outer casing of the casing can be produced by the Hunan terminal (four), and the outer frame of the display panel of the output panel of the casing can be fixed. The invention of the flat display module in the 1274934 mobile phone can effectively save or improve the size of the liquid crystal display module and the terminal products such as mobile phones. In summary, the flat display module of the present invention can effectively improve the size limitation of the flat display module due to the outer frame in the prior art, and further meets the market demand for miniaturization of the flat display module. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the patentable scope of the present invention should be covered by the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a conventional liquid crystal display module. Fig. 2 is a schematic cross-sectional view showing a flat display module according to a first embodiment of the present invention. Fig. 3 is a schematic view showing the appearance of the light guide plate and the diffusion sheet shown in Fig. 2. Figure 4 is a cross-sectional view showing a flat display module in accordance with a second embodiment of the present invention. Figure 5 is a side elevational view of a flat display module in accordance with a third embodiment of the present invention. Fig. 6 is a schematic view showing the appearance of the light guide plate and the diffusion sheet shown in Fig. 5. Figure 7 is a side view of the flat display module of the fourth embodiment of the present invention, 15 1274934. Figure 8 is a plan view of the flat display module shown in Figure 7. Figure 9 is a cross-sectional view showing a flat display module in accordance with a fifth embodiment of the present invention. Fig. 10 is a schematic view showing the appearance of the light guide plate and the diffusion sheet shown in Fig. 9. [Main component symbol description]
10 液晶顯示模組 12 液晶顯示面板 14 導光板 16 擴散片 18 稜鏡片 20 反射片 22 外框 30 平面顯示模組 32 導光板 34 透光板體 36 定位柱 38 平面顯示面板 40 擴散片 42 稜鏡片 44 定位膠 46 固定膠 48 擴散片缺口 50 入光面 60 平面顯示模組 62 導光板 64 透光板體 64a、 64b透光板體侧面 66 定位柱 66a Λ 66b、66c定位柱側面 68 平面顯示模組10 Liquid crystal display module 12 Liquid crystal display panel 14 Light guide plate 16 Diffusion sheet 18 Bract 20 20 Reflector 22 Outer frame 30 Flat display module 32 Light guide plate 34 Translucent plate 36 Positioning post 38 Flat display panel 40 Diffusion sheet 42 Bract 44 Positioning glue 46 Fixing glue 48 Diffuser sheet notch 50 Into the light surface 60 Flat display module 62 Light guide plate 64 Translucent plate body 64a, 64b Translucent plate body side 66 Positioning post 66a Λ 66b, 66c Positioning column side 68 Flat display mode group
16 1274934 68a 平面顯示模組缺口 70 擴散片 72 棱鏡片 74 反射片 76 擴散片缺口 78 固定膠 80 光源產生器 82 定位膠 1716 1274934 68a Flat display module notch 70 diffuser 72 prism sheet 74 reflective sheet 76 diffuser notch 78 fixing adhesive 80 light source generator 82 positioning adhesive 17